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Apple customers no longer have the option to buy an iPhone with a headphone jack now that the trillion-dollar technology company has killed off two older models to make room for its most expensive smartphones to date.

The current iPhone product line-up is void of the traditional headphone jack and instead customers must use Apple-specific headphones or buy an adapter.

Apple was branded "greedy" by critics when it introduced the iPhone 7 in 2016 without the 3mm headphone jack, forcing customers to buy Apple-manufactured replacements that would fit the new iPhone-specific port found at the bottom of the phone.

At the time, Apple’s chief designer Jony Ive said that its removal was down the company’s “obsession” to “simplify and improve”. It led to a sales boost in adaptors, which could be plugged in so that other headphones with the traditional 3mm jack could work with the phones.

In replacement, the three new iPhones will be available to pre-order from September 14. New features include larger screens, a new camera system that improves depth of field for “portrait mode” and improved battery time. The iPhone XS has 30 minutes more battery power a day than the iPhone X and the iPhone XS Max remains powered for one hour and thirty minutes longer than its predecessor.

The popular iPhone SE has been discontinued

Apple chief Tim Cook said the devices “took iPhone to the next level”, however the announcements received mixed responses across Twitter, with several tweeting pictures of piles of cash going up in flames and making jokes about "selling kidneys" to afford any of the new products.

Apple also announced an upgrade to its smartwatch with a variety of healthcare features. The Series Watch 4 has the first medical regulator-approved over-the-counter ECG monitor in a wearable, and has improved heart monitoring technology to detect irregular heartbeats, which can cause strokes.

It can detect if a wearer has fallen over and alerts emergency services if they remain motionless for more than a minute, which could be potentially life-saving for elderly people living alone.